Is it necessary to get rid of paint on concrete before laying ceramic tiles?

There is a saying. If the paint won't stick then anything you put over the paint won't stick.

I never trust paint (just like I never trust wallpaper). I have seen to many times when it was put on dry (not enough moisture to allow it to stick to the surface) and it peals in just about any situation. They put it on dry thinking that it keeps from dripping and they are too lazy to want to do any cleanup or put down drop clothes. Many times people don't use the right paint for the right situation.

For this reason I am a big fan of removing paint and wall paper if needed.

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Is it necessary to get rid of paint on concrete before laying ceramic tiles?

Quote:

Originally Posted by yesitsconcrete

angus, is that the bosch 4" conc planer ? ? ? we use std 7"/9" 15a grinders,,, MUCH faster & MUCH less expensive ! ! ! beaneedoo works but it leaves its own stains/mess.

It's the Bosch 5" concrete grinder. http://www.amazon.com/Bosch-1773AK-C.../dp/B0000719W8
I have to remove thinset from concrete in small bathrooms (powder rooms) at times and this works perfect. If I have a need for anything larger, my neighbor is an excavator and will let me borrow whatever scarifier I need!

Is it necessary to get rid of paint on concrete before laying ceramic tiles?

Angus:

The pic makes it look easy......

I just don't want paint particles and concrete particles all over the air.
But since there is an vac attachment then this does seem like a possibility.

What is that thing called? Do they rent it out at the big box stores?
And the vaccuum, does that come with the grinder.

Do I have to get right to the bare concrete?
I think underneath there is another coat of paint which probably is the original one from 70 years ago. and that probably has really bad stuff in it. When I start to grind it, won't it be harmful to breath in?

Is it necessary to get rid of paint on concrete before laying ceramic tiles?

Quote:

Originally Posted by yummy mummy

Angus:

The pic makes it look easy......

I just don't want paint particles and concrete particles all over the air.
But since there is an vac attachment then this does seem like a possibility.

What is that thing called? Do they rent it out at the big box stores?
And the vaccuum, does that come with the grinder.

Do I have to get right to the bare concrete?
I think underneath there is another coat of paint which probably is the original one from 70 years ago. and that probably has really bad stuff in it. When I start to grind it, won't it be harmful to breath in?

It's a concrete grinder. Not sure if big box stores rent it. When I need a tool, I unfortunately have to just buy it .

I can't imagine it would be hard to find though. It's the perfect tool combo for your situation. SOMEONE has to rent it. Try just a regular ole rental store. There's actually one right across the street from my local home deplore. Has a lot more to offer than the apron place.

Is it necessary to get rid of paint on concrete before laying ceramic tiles?

be surprised if the avg rental place has angus' bosch OR a dust-shroud fitt'd grinder,,, then again, most use grinders,,, our orange apron rental dept's got 1 even tho most dit-ers/h-o's don't know what it is,,, if you can't hook this up to a wet/dry vac, you'll never lay the floor.

Is it necessary to get rid of paint on concrete before laying ceramic tiles?

Just for the the record........

Paints and sealers are known industry-wide to be bond breakers when it comes to tile. It IS NOT RECOMMENDED that tile be installed over any painted or sealed concrete surface.

To remove paint or sealers from concrete surfaces chemicals should not be used, chemical strippers are also known bond breakers. The only industry-acceptable method of removal is through mechanical abrasion. Sandblasting, shot blasting, scarifying, grinding.

Is it necessary to get rid of paint on concrete before laying ceramic tiles?

i don't know of any pro who'd use less than mechanical means to prep a floor,,, yes, there are solutions/solvents/poultices/potions which'll soften paint/cutback/emulsion/mastic & can do so while being environmentally safe, planet-friendly, go suck an egg

the main drawback to the aforementioned wish list is getting the NEW grout/thinset to ADHERE to the greasy surfaces left behind by tree-hugging-stuff-in-a-can,,, i can't believe ANYONE'd be stupid enough to say that ANYONE ( bud & me includ'd ) can put concrete directly on the painted basement wall and it would be fine,,, that's just idiotic & should insult anyone's intelligence

now having had my daily small rant, ignorance is another issue &, thankfully, there's a cure for that - EDUCATION ! ! ! HIE THYSELF TO ANOTHER STORE toot sweet ! ! !